Locomotive.



F. F. GAINES.

. LOCOMOTIVE.

APPLlcATloN man luLv 24.1913.

1 1 77,3 1 3 v l Patented Mar. 28, 1916. y 2 ES--SHEETI- preserved y narran -srains Arun reanimeren Gamas, or SAVANNAH, GEORGIA, Assieivoza, BY iunsim Assieinviiiivms,

' `f wenn.

following is a specification.

My invention relates to. improvements yin locomotive boilersgand has particular referenceto boilers. of the wide ireboX type.

`In the modern development of locomotives it has been found'necessary to make the fireboX as wide as'` practical in order to` provide sufficient grate" area, and in conjunction Awith thelarge driving wheels now used this has foiced the raising of the .grate to a liei-ght where the `forward end ofthe mud ring'will clear-the large rear drivers of the locoinotive. As `the total height `is limited, thisfraising of the grate has tended to reduce thefheight of the fireboxitself to such an extent that proper combustion cannot be mainf tained therein. These `detrimental features `are made particularly noticeable when it is l desired to equip suchl fireboxes with a trans- `verse baille wall arranged' between the fuel bed and fines.. l

Theob ect of mv invention is to rovide a 'nrebox construction in which and by which the advantages of the wide firebox shall be andby means of which the'advantages ofthe transverse refractory baffle' inaybe-coinbined with the wide grate in such a'manner vthat the combustion of the f iielfiised shallfbe sultistantially perfect and i complete.' within the `firebox, the heat thereof mosti'advantageously transmitted to the `water of the boiler and the ejection of unburned' fuel particles and other non-gaseous i .products lof combustion ,from the `iirebox shallibe effectively prevented.'

V A furtheuobjectof "my invention isto 'provide a firebox of the wide type which shallbe-.adapted to receive a cross wall therein and which shall beso constructed that a wallfof Asuitable lheight` may be installed without reducing the passage above the wall 4to too smallan area.

Affurther object of my invention is to increase the net quantity of the fuel which A Q can be*advantageously burned in a {irebox t of specifieddimensions: to'increase the econ,- omy and eilicienoy` of yfirelioxesg and to pre vent the escaping of tlijc" fuelor gases of Specification of Letters Patent. `Application led July 24, 1913. Serial No. 780,967.

ing within the firebox.

l l T iilllll.ERICLAN' .ARCI-I COMPANY', 0F NEW YORK, N. Y., A COPORATION 0F :DELA- LOCOMOTIVE.

Patenten Mar. 2e, isis.

combustion from the irebox until substantially perfect combustionl has taken place.

My invention consists in a' locomotive boiler iireboX wherein the side walls betweenv their ends drop below the general level of the --lower edge of the irebox, the lowest point being adjacent to the forward end and spaced from the flue sheet, and a refractory cross wall in the fireboX arranged opposite to or between these lower pointsand ris- My `invention also consists in 'a locomotive equipped with a wide'lirebox, the forward endthereof being arranged above the rear drivers of the locomotive, the rear end of the firebox' being arranged at substantially the same level as the forward end and the sides lbeing inclined downwardly from (sol each end to a point substantially a quarter or wall arranged within the iirebox between the lowv points' of the side wallsthereof, a grate extending vupwardly from the lower part of the wall to the rear end of the fire box and a floor closing the space between the cross wall and the forward end of the firebox.

It has also been difficult heretofore in fireboxes of this type, wherein the grate extends to the forward end of the boiler, to obtain the benefits of water circulating tubes which extend from the lowerpart of the. flue sheetto the upper part of the rear sheet, for the reason tliat'the space between the lower flues and the grate surface at the forward end of the boiler has been tob shallow to permit the installation of such tubes, above a fuel bed of the proper thickness. li'urthermore, a's these boxes are relatively very wide and as the water circulating tubes could not be installed therein, it hasbeen diiiicult, if not absolutely impossible, toinstall or make use of so-called front arches which are being used at the present time in locomotive boiler fireboiies to enhance the efiiciency thereof. eliminated by my invention for I separate the forward end of the iireboxfrom the forward end` of the grate by means of a re- 'fractory cross wall, and, furthermore, I vdepress the forward end of -tlie grate to` These difficulties are 'with equal advantage.

wall..` I am thus enabledto carry' the fuel.

bed on the grates, which extend from the wall. to the rear end of the boiler, ofthe'de- -a front arch composed `of bricks which rest on and are supported by the tubes.

My invention willbe more readily understood by reference to the accompanyingdrawings forming part ofthis specification and in which:

Figure l is a Ilongitudinal sectional view of the rear portion 'of a locomotive .which `embodies my invention; Fig. -2 is a transverse sectional View of the -ireboXn on the line 2-2 of Fig. l; Fig. 3 is a View similar to Fig. 2, looking forward in the irebox and taken on the line 3-3 of Fig.l l; and Fig. 4. is a section lof the irebox similar to Fig..3, taken on the line 4 4 of Fig. l.

While I have illustrated my invention as embodied in 'a lirebox o f the extreme wide type it will be apparent tol those skilled in the art that many of the features of the invention -may be used in narrower iireboxes .In the drawings I have illustrated the yrear portion only of a locomotive showing a firebox A mounted on the locomotive side .frames B, the frames being supported upon the rear trailer wheels C and the large drivers'D. The reboX is arranged with its forward end al above the large drivers, and the box is of such a width relative to thev transj Averse spacing o f the drivers that the sides a2 ofthe lirebox are considerably beyond the drivers transversely of the firebox. The lower'edg'e a3 of the forward end of the ireboX -is raised considerably above theupper edges of the frames in. order that suflicient the front water leg a5 relatively short vertiycally;A In boilers of this type, as heretoforel -Sp'ace may be provided between the drivers andthis edge, to allow for the' relative up and down movement of the boiler, 'and in order .that the boiler,; asa whole, mavnotl -be raised t'oo high the barrel aoffthe boiler is arranged as'low as possible, thus making used, the grate extended from the lower edge ,as of the front end of the boiler toI the rear end a6, and-consequently the space between the forward end o f the grate and thelower! was too small to permit.

most ofthe fiues a7 the carrying of a fuel bed of proper depth and particularly eliminating 'the possibility of installation and culating tubes. I eliminate theseundsir-- able features by cutting off the forward part of the rebox as of, by means of I arrange this from the rear part a9 therearefractory cross wall E. wall preferably about miduse of arch or water` cirway between the middle of the length of the fireboX`and the forward end, whereby the forward space 4a@ is considerably less in dimensions than the main combustion chamber a. Furthermore, I drop the wall down so, that its lower edge is below the forward end a3 of the firebox,'.ther eby producing at this point a firebox of considerably greater vertical depth than at thevforward end, that is, the space between the lower edge of the wall and the crown sheet al is considerably more than the height of the flue sheet. This provides sufficient height at this point so that I can build the wall E of a reasonable height without too greatly reducing the space or passage a between th upper edge of the wall and the crown sheet. rI`he wall E not only serves to cut off the forward end of the flreboX and thus permit the installation of water circulating tubes Fl but it serves also to prevent the direct flow of thegases from the.- fuel bed to the flues and serves to effect the intermingling and miX-.

ing of the gases of combustion and* thus result in their more perfect'combustlon.

In the form of my invention illustrated' in the drawings I have arranged agrate G betweenthe lower edge'of the wall E and the rear sheetl a of the rebox inclined up-l wardly from the base' of the wall, the rear end of the fireboX, as shown, isprovided with one or more fuel doors or openings m2. As the grate as described molines downwardly and forwardly from the rear end of the lirebox, the fuel can .be readily deposited upon the fuel bed inthe required places and,

furthermore, the inclination of the grate serves to cau'seltheI vfuelbed to workforward in the irebox dueftothe' vibration ring to which the firebox. is subjectedv in use.' The lower edges L22 of thetsides a2 conform and jar-y to and withthe position ofthemcross wall E,

that is, the forwardparts-- incline downwardly from the forward en'd a? of the lir`ebox` to the lower part of the wall and the rear portions incline lu wardlyfrom the wall to the-rear end o the firebox.

The

side sheets thus serving to completely close theA sides of the. firebox, I preferably lform the wall-E of a 4plurality of ho'rizontalrows e1 of bricks-e2,

iis

and I support` the wall upon 4 across bearer or bridge member H whichv extends across the ywidth of the'- firebox and is secured at its-ends to the lower edges of,-

This bridge mem- .i ber is provided lwith depending bearing por- .tions h1 spaced in accordance with the spacthe sides of the Firebox.

ing of the frames B and' adapted to be supported upon suitable bearings thereon. This bridge member is in the form of an open bottomedv trough having 'a forward vertical Vwall 71,2,.a rear vertical 'wall La-and' an up- The bridge member:

per horizontal wall 7a4.

1s co-extensivein width with the thickness of the wall E and its rear wall h3 rises above the horizontal` plate fr* and forms an abutment to .assist in retaining the wall E in which the w-allis composed to the upper lend of the buck stay'plate by means of bolts e5.

'i i I close the space between the wall andthe forward end of the boilerbymeansof an upwardly and forwardlyinclined floor plate Kzsecuring it at its rear edge to the ybridge lmember and at its forward edge to the fireox. .l V.

One advantageous feature of my invention is that the auxiliary combustion chamber a8 serves to permit the' expansion of the gases of 4combustion -as lthey enter therein and these gases consequently are caused to drop or deposit their burden of cinders'or other non-gaseous productsof combustion. T hese. products collect in the lower end of this chamber'and for the purpose of Couveniently removing them, from time to time, I provide a cinder outlet or hopper ,701 in the middle portion of .the lower vend of this chamber and I' normally keep the lower end of this cinder hopper closed by meansof a cover plate k2'. For the purpose of causing the cinders or other particles which may collect in this chamber to collect within the outlet c.1`I till in the lower end of this chamber with suitable material providing it with a hoppered oor 7c3 which inclines from the walls thereof to the outlet k1.,

For the purpose of aiding in the thorough and complete combustion of. the fuel, I profv i vide the wall E with vertically extending air inlet passages e which extend from the lower edge of the wall and open into the main combustion chamber afthrough rear- Y wardly extending inlets .e7 which open through the rear face of the wall below the upper edge thereof 'and' for the purpose of admitting air intol these passages I provide suitable nozzles e" secured in openings 'e9 in the upper wall L of the bearing member I' 'l and which project downwardly therefrom having' their lower endsextending forwardly and provided with flaring nozzles.

el". This construction serves to force air upwardly through the passage e, particularly when the locomotive is in motion forwardly. The water circulating tubes F extend upwardly from the lower part of the flue sheetP As a further security .I' sometimes fasten the upper row of'bricks of to the upper part of the rear sheetand serve not only to increasel the circulation of the water in the boiler but these tubes also serve as excellent mediums through' which to transmit heat from the firebox to the water. I preferably arrange these tubes so that 4 they extend through the upper part of the wall, providing the buckstay plate with notches t to receive the tubes. These tubes are therefore steadied and held in position by the wall and I sometimes add a further refractory deflector in the form of an inclined frontl arch Mwhich I arrange'against the rear face of the upper part of the wall form- .ing this arch` of bricksmthese bricks be- .ing of a sultan-ie length so they extend' between and arey supported upon the tubes. The bricks are'preferablyarranged in rows acrossthe rebox andin rows longitudi-l nally in the firebox." `This arch extends .from the wall` toward therear end. of the rebox, but I amcareful to maintain' between the' rear end o thewfall and the flue .sheet av spacem2 suiii ient to permit the gases of combustionto ow upward and forward in the fire box from the main combustion' chamber a to the auxiliary combustion chamber as. This arch serves to cause the products ofcombustion to How rearwardly in the firebox whereby they are caused to contact with substantially the whole interior surface of the rebox and particularly f' with the crown sheet through which they can 'eiiciently deliver heat 4to the 'boiler water. Not only does the arch serve to cause this distribution ,of the gases in the rebox but yit also serves to cause the Vthorough intermingling and interinixing of the gases, and particularly the intermixing of the air. discharged' into the firebox throughthe air'inlet passages a with the burning gases, whereby substantially .complete combustion is insured.

In order that the more centrally located tubes F will not encroach too closely upon the lower edge a3 of the firebox I depress the forwardend of the firebox in its middle portion as shown in Fig. 3 at als, dropping 1t downward at this point considerably below the tops of the drivers and. thus provid ing sufficient space a below 'the forward ends cf the central tubesv F to prevent the entrar ce into the tubes of the mud or sedi- /ment which collects within the water'leg of the boiler upon the foundation ring or mudr1n0'. Y -v s described, the firegox may be said to be closed at its bottom bf,""two planes inclined longitudinally with. relation to each other, their meeting edges being' considerably lower than their opposite ends, and the firebox being equipped adjacent to the meeting edges of these planes with a transverse refractory wall which divides the firebox into two portions., In other words the sidewalls of the Iirebox areVshaped in side elevation the point of the V being located at the lower part of the transyerse'refractory wall.

As Vmany modifications of my invention will readily7 suggest themselves to one skilled n in the art I do not limit or confine my inpurpose described.

fire box between the wall and the'rear end? ofthe fire box, substantially as and for the 2. In a. locomotive the combination ,with 'the rear drivers, of a fire box the forward end of which is positioned above the drivers, the lower side edges of the tire boxI being inclined downwardly from the forward end to apoint spaced'therefrom, a cross wall rising within the fire box at' this point, an -upwardly inclined substantially tight closure for the space between the wall and 'the front end of the fire box and a grate closing the ,lower part of the re box between the wall and the rear end of the firel box, substantially as and for the purpose described.

3. In alocomotive thecombination with the rear driving wheels, of a fire box the forward end of which extends over the drivers, the rear end of the re box being substantially on a level with the forward4 end thereof, the lower end of the fire box being formed on roppositely downwardly in-V clined planes meeting upon a line spaced from the forward end, a cross wall rising within the tire box from this line, a grate extending upwardly and rearwardly from the wall Vto the rear endof the fire box, and a substantially tight closure extending upwardly and forwardly, from the wall to .the forward envd of the fire box substantially as and for the purpose described.

4. In a locomotive the combination with the rear driving wheels, of a fire box the forward end of"` which extends over the drivers, the Arear end of the fire box being substantially on a level with the forward end thereof, thelower end 'ofi the fire box being formed 'on oppositely downwardly inclined planes which meet upon a line between the forward end and the middle thereof, a cross wall rising within the fire box fromthis line a grate extending upwardly and rearwardly from the wall to the rear end of the fire box,

and a substantially tight closure 4extending upwardly and forwardlyfrom the wall to the forward end ofthe fire box substantially` as and for the purpose described.

5. A `locomotive boiler irebox having a f rectangular mud ring'the sides of which are bent downwardly intermediate the front and -rear ends of theV mud ring, in combination with a cross wall erected in said firebox at the point marked by the bends of s aid mud ring.

In testimony whereof, I have hereunto set my hand, this 27th day of June, 1913, in the presence of two subscribing witnesses.

FREDERICK F. GAINES.

` Witnesses:

' J. R. KEUPER,

J. G. KELLAM 

